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Rough-to-smooth transition of an equilibrium neutral constant stress layerA model is proposed for low-level atmospheric flows over terrains of changing roughness length, such as those found at the windward end of landing strips adjoining rough terrain. The proposed model is used to develop a prediction technique for calculating transition wind and shear-stress profiles in the region following surface roughness discontinuity. The model for the transition region comprises two layers: a logarithmic layer and a buffer layer. The flow is assumed to be steady, two-dimensional, and incompressible, with neutral hydrostatic stability. A diagram is presented for a typical wind profile in the transition region, obtained from the logarithmic and velocity defect profiles using shear stress calculated by relevant equations.
Document ID
19750059208
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Logan, E., Jr.
(Arizona State University Tempe, Ariz., United States)
Fichtl, G. H.
(NASA Marshall Space Flight Center Huntsville, Ala., United States)
Date Acquired
August 8, 2013
Publication Date
June 1, 1975
Publication Information
Publication: Boundary-Layer Meteorology
Volume: 8
Subject Category
Meteorology And Climatology
Accession Number
75A43280
Distribution Limits
Public
Copyright
Other

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